Changelog

Feedback Endpoint

A new feedback API endpoint to capture quality signals from your production systems. Submit a score and optional free text on any call output, ideal for applications that already collect user signals like thumbs up/down or task success metrics.

• Score + free text feedback to capture both quantitative and qualitative signals
• Automatic example saving – high-quality outputs are automatically added to datasets for in-context learning
• Pattern analysis – feedback signals help identify good and bad patterns over time

import { Opper } from "opperai";

const opper = new Opper();

const response = await opper.spans.submitFeedback(
    "your-span-id",
    { score: 1.0, comment: "Exactly what I needed!" }
);

Learn more in our blog post on Automating In-Context Learning using Feedback.

In-Context Learning

Functions can now learn from examples provided in context, improving output quality. Enable in the platform

• Dynamic few-shot learning by providing relevant examples at call time
• No retraining required – improvements take effect immediately

Alerts on Quality Degradation

Proactively monitor your AI functions with automatic quality alerts. Opper now detects when your functions start to underperform and notifies you before issues impact users. Enable them in the function overview , in the platform.

• Automatic detection of quality regressions based task performance
• Configurable thresholds to match your quality requirements
• Email notifications to keep your team informed

Models

Added support for Grok 4.1, expanding the portfolio of high-performance models available via the Opper API.

• xai/grok-4-1-fast-non-reasoning
• xai/grok-4-1-fast-reasoning

Added support for the new Google Gemini 3 Flash Preview model:

• gcp/gemini-3-flash-preview

Multi-Provider Alias for Claude Opus 4.5

Claude Opus 4.5 is now available across multiple cloud providers with automatic failover support via model aliases.

Use multi/claude-opus-4.5 to automatically route requests across all available Opus deployments with built-in failover:

• azure/claude-opus-4.5
• aws/claude-opus-4.5-eu
• gcp/claude-opus-4.5
• anthropic/claude-opus-4.5

If one provider is unavailable, requests seamlessly route to the next available option.

Models

• Opper now supports EU-based inference for all major AI lab models.
• Added a new provider: Novita.
• Introduced DeepseekOCR, the top OCR benchmark scorer.

New Models:

• novita/deepseek-ocr

• novita/minimax-m2

• gcp/gemini-2.5-pro-eu

• gcp/gemini-2.5-flash-eu

• gcp/gemini-2.5-flash-lite-eu

• gcp/claude-sonnet-4

• gcp/claude-sonnet-4-eu

• gcp/claude-sonnet-4.5

• gcp/claude-sonnet-4.5-eu

• groq/gpt-oss-safeguard-20b

• xai/grok-4-eu

• xai/grok-4-fast-non-reasoning-eu

• xai/grok-4-fast-reasoning-eu

• xai/grok-code-fast-1-eu

Opper Agent SDKs

We've released new Opper Agent SDKs for Python & TypeScript – a powerful framework for building intelligent, headless agents that can reason, act, and collaborate seamlessly.

Key features include:

• Simple 3-step agent creation with tools and model selection
• Model Context Protocol (MCP) integration for external services
• Model interoperability across all supported LLM providers
• Comprehensive hook system for lifecycle management
• Multi-agent systems with agent-to-agent delegation
• Built-in observability and tracing
• Production-ready with type safety, error handling, and async support

pip install opper-agents

Learn more in our Agent SDK blog post and explore the GitHub repository for comprehensive examples and documentation.

Structured Streaming Support

We've enhanced our streaming capabilities with structured streaming support, enabling real-time streaming of structured JSON data with precise field tracking.

Key Features

Two Streaming Modes:

• Text Mode: Traditional incremental text streaming for conversational AI and open-ended responses
• Structured Mode: Stream structured JSON with precise field tracking via json_path

JSON Path Tracking: When using output_schema, each streaming chunk includes a json_path field showing exactly which schema field is being populated:

• response.summary → Top-level string field
• response.people[0].name → Name of first person in array
• response.people[1].role → Role of second person
• response.metadata.created_at → Nested object field

This enables precise UI updates where you can route streaming content to specific components based on the path, creating responsive real-time interfaces.

Example Usage:

from opperai import Opper

opper = Opper(http_bearer="YOUR_API_KEY")

# Stream a story with structured output schema
stream_response = opper.stream(
    name="story_writer",
    instructions="Write a short story about a robot discovering emotions",
    input={"theme": "robot emotions", "length": "short"},
    output_schema={
        "type": "object",
        "properties": {
            "title": {"type": "string", "description": "Story title"},
            "body": {"type": "string", "description": "Story content"},
            "author": {"type": "string", "description": "Author name"}
        }
    },
    model="openai/gpt-4o-mini"
)

for event in stream_response.result:
    if hasattr(event, "data") and hasattr(event.data, "json_path"):
        field = event.data.json_path
        content = event.data.delta
        
        if field == "response.title":
            print(f"📖 Title: {content}", end="", flush=True)
        elif field == "response.body":
            print(f"{content}", end="", flush=True)  # Stream story content
        elif field == "response.author":
            print(f"\n✍️ Author: {content}")

Learn more in our streaming API documentation.

Model Aliases and Automatic Fallbacks

Create model aliases to improve reliability and simplify model management. Aliases are organization-scoped friendly names that map to an ordered list of fallback models.

Create an alias:

curl -X POST https://api.opper.ai/v2/models/aliases \
-H "Authorization: Bearer YOUR_OPPER_API_KEY" \
-H "Content-Type: application/json" \
-d '{
  "name": "sonnet4",
  "fallback_models": ["aws/claude-sonnet-4-eu", "anthropic/claude-sonnet-4"],
  "description": "Preferred Claude Sonnet with fallback"
}'

Use the alias:

opper.call(model="sonnet4", ...)  # Automatic fallbacks included

Benefits:

• Higher success rates: automatic failover when models are unavailable
• Easier operations: no alerts when providers have issues
• Safer upgrades: swap models without touching application code
• Team consistency: shared aliases across your organization

Learn more about model aliases and fallbacks.

New Models

• Added support for AWS Bedrock GPT-OSS 20B and GPT-OSS 120B models
• Added support for xAI grok-code-fast-1 model (xai/grok-code-fast-1)
• Added support for Groq Kimi K2-0905 1T 256k model (groq/moonshotai/kimi-k2-instruct-0905)

Imagen 4 Models

Added support for Google Imagen 4 models – generate higher-quality images with improved detail and fidelity.

New Models

• fireworks/deepseek-v3.1
• fireworks/glm-4.5-air
• fireworks/glm-4.5
• openai/gpt-5
• openai/gpt-5-mini
• openai/gpt-5-nano
• anthropic/claude-opus-4.1
• fireworks/qwen3-coder-480b-a35b-instruct
• fireworks/qwen3-235b-a22b-thinking-2507
• gcp/gemini-2.5-flash-lite
• groq/gpt-oss-20b
• groq/gpt-oss-120b

Models

• Added Codestral-2508 model (mistral/codestral-2508)
• Added Gemini 2.5 Flash Lite model (google/gemini-2.5-flash-lite)
• Added Kimi K2 Instruct model (groq/moonshotai/kimi-k2-instruct)
• Added Magistral Small model (mistral/magistral-small-2507-eu)
• Added Magistral Medium model (mistral/magistral-medium-2507-eu)
• Added xAI model GROK-4 (xai/grok-4)

Pricing

• Updated O3 model pricing to reflect new rates.

Models

• Added Gemini 2.5 Pro (gcp/gemini-2.5-pro) and Gemini Flash (gcp/gemini-2.5-flash) GA models to the platform.
• Added support for Gemini 2.5 Pro Preview (gcp/gemini-2.5-pro-preview-06-05) and Qwen-3-32B (cerebras/qwen-3-32b) models.
• Removed discontinued Gemini 1.5 models (gcp/gemini-1.5-flash, gcp/gemini-1.5-pro, and gcp/gemini-1.0-pro-vision) from the platform.

Models

• Added Google Gemini model gcp/gemini-2.5-flash-preview-05-20
• Added Anthropic Opus 4 (anthropic/claude-opus-4)
• Added Anthropic Sonnet 4 (anthropic/claude-sonnet-4)
• Added Sonnet 3.7 model (AWS US region), aws/claude-3.7-sonnet, to the platform
• Added fireworks/deepseek-v3-0324 model to the platform

Platform

• Introduced a new pricing model with more granular service tracking, providing greater transparency and cost control for your AI operations

OpenAI GPT Image 1 Model: New Image Generation Capability

We've added OpenAI's new gpt-image-1 model to our platform, expanding our image generation capabilities. This addition gives you access to OpenAI's latest image generation technology:

• openai/gpt-image-1

Embeddings Support in Node.js SDK

We've added embeddings functionality to the Node.js SDK, enabling you to generate vector embeddings for your text content. This new capability allows you to perform semantic search, content clustering, and other vector-based operations directly through our Node.js interface.

Evaluations Support in Python and Node.js SDKs

We've added support for creating evaluations directly from the Node.js SDK. This new capability allows you to create and manage evaluations programmatically.

Embeddings Support in Python SDK

We've added embeddings functionality to the Python SDK, enabling you to generate vector embeddings for your text content. This new capability allows you to perform semantic search, content clustering, and other vector-based operations directly through our Python interface.

Gemini 2.5 Flash Model

We've added Google's Gemini 2.5 Flash exp model to our platform:

• gcp/gemini-2.5-flash

Claude 3.7 Sonnet on AWS

We've added the Claude 3.7 Sonnet model to our AWS provider:

• aws/claude-3.7-sonnet-eu

OpenAI o3 and o4-mini models

• Added openai/o3
• Added openai/o4-mini

OpenAI GPT-4.1 Models: New AI Options

We've added OpenAI's latest GPT-4.1 models to our platform, giving you access to their newest and most capable AI models. These additions expand your options for powerful, state-of-the-art AI capabilities:

• Added openai/gpt-4.1
• Added openai/gpt-4.1-mini
• Added openai/gpt-4.1-nano

New Grok 3 Models Avilable

• Added xai/grok-3
• Added xai/grok-3-mini-beta

Updated Mistral Models on Azure

We've replaced the retired Mistral model with the latest version available on Azure. This update ensures continued access to Mistral's powerful language capabilities with improved performance:

• azure/mistral-large-eu is using the latest Mistral Large model (2411)
• azure/mistral-large-2407-eu has been removed

PDF Media Type: Node.js SDK

We've added PDF media type support to the Node.js SDK (v2.7.0), enabling you to work with PDF documents in your applications. This enhancement expands the range of file types you can process using our SDK and simplifies PDF document handling in your Node.js projects.

Llama 4 Scout: New Model on Groq

We've added Meta's Llama 4 Scout model to our Groq integration, giving you access to this powerful new instruction-tuned model. Llama 4 Scout provides excellent performance while maintaining efficiency, expanding your options for AI-powered applications.

• groq/llama-4-scout-17b-16e-instruct

Llama 4 Maverick: New Model on Groq

We've added Meta's Llama 4 Maverick model to our Groq integration, giving you access to this powerful new instruction-tuned model. Llama 4 Maverick features an impressive 131,072 token context window and 8,192 max completion tokens, allowing you to process much larger documents and conversations in a single request.

• groq/llama-4-maverick-17b-128e-instruct

Gemini 2.5 Pro: Experimental Version

We have updated the Gemini 2.5 Pro model to an experimental version, providing our customers with access to the latest advancements in AI technology.

• gcp/gemini-2.5-pro-exp-03-25

Cursor Rules: AI-Powered Code Assistance

We have released markdown files for AI code editors like Cursor that provide context for using the Opper SDK. These files serve as comprehensive guides for AI tools to understand how to interact with Opper for structured calls, indexing operations, tracing, and evaluations.

• Available for both Python and TypeScript
• Place in your project as .cursor/rules/opper.mdc
• Enhances AI coding assistance with Opper-specific knowledge
• Learn more at https://docs.opper.ai/sdks/llmtxt

OpenAI GPT-4.5 preview

We have added support for the new GPT-4.5 model.

• openai/gpt-4.5-preview

Claude 3.7 Sonnet

We have added support for the new Sonnet model.

• anthropic/claude-3.7-sonnet
• anthropic/claude-3.7-sonnet-20250219

Thinking

In order to use the new Thinking mode in Claude 3.7, you can do something like this:

import asyncio
import os
from opperai import AsyncOpper
from opperai.types import CallConfiguration

opper = AsyncOpper()

async def main():
    result, _ = await opper.call(
        name="respond",
        model="anthropic/claude-3.7-sonnet",
        input="What is the capital of Sweden?",
        configuration=CallConfiguration(
            model_parameters={
                "thinking": {
                    "type": "enabled",
                    "budget_tokens": 1024,
                },
            }
        ),
    )

    print(result)

asyncio.run(main())

Embeddings API

The API now supports getting embeddings for arbitrary input. While our indexes are the most straightforward way of using external knowledge for RAG use-cases and other things, this provide advanced users greater control over embeddings for custom use-cases.

Example: Input as string

curl -X POST "https://api.opper.ai/v1/embeddings" \
  -H "x-opper-api-key: op-your-key-here" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "azure/text-embedding-3-large",
    "input": "The text"
  }'

Input as list of strings

curl -X POST "https://api.opper.ai/v1/embeddings" \
  -H "x-opper-api-key: op-your-key-here" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "azure/text-embedding-3-large",
    "input": ["First text", "Second text", "Third text"]
  }'

Available embedding models

• azure/text-embedding-ada-002
• azure/text-embedding-3-large
• azure/text-embedding-3-large-1536
• openai/text-embedding-ada-002
• openai/text-embedding-3-large
• openai/text-embedding-3-small
• opper/e5-mistral-7b-instruct

Gemini 2.0: Flash-Lite

We have added support for Gemini 2.0 Flash-Lite, hosted by Google Cloud Platform (US). You can access it in Opper using the model name:

• gcp/gemini-2.0-flash-lite-preview-02-05

OpenAI API/SDKs Compatibility Layer

We have added an OpenAI compatibility layer that allows you to use Opper models with the OpenAI API and SDKs. This gives you the ability to use any model provided by Opper in any project that uses the OpenAI API/SDKs. The compatibility layer supports additional Opper functionality through extra body arguments:

• fallback_models: A list of models to use if the primary model is not available
• tags: A dictionary of tags to add to the request
• span_uuid: The UUID of the span to add to the request
• evaluate: Whether to evaluate the generation or not

Python example using these features:

import os
from openai import OpenAI
from opperai import Opper

opper = Opper()

client = OpenAI(
    base_url="https://api.opper.ai/compat/openai",
    api_key="-", # must not be blank
    default_headers={"x-opper-api-key": os.getenv("OPPER_API_KEY")},
)

with opper.spans.start("reverse-name") as span:
    response = client.chat.completions.create(
        model="gorq/deepseek-r1-distill-llama-70", # This model is not available since provider is called "gorq" and not "groq"
        messages=[
            {"role": "user", "content": "What is the capital of France? Please reverse the name before answering."}
        ],
        extra_body={
            "fallback_models": [
                "groq/deepseek-r1-distill-llama-70b",
            ],
            "tags": {
                "user_id": "123",
            },
            "span_uuid": str(span.uuid),
            "evaluate": False,
        }
    )

Node example using these features:

import { OpenAI } from "openai";
import OpperAI from "opperai";

const opper = new OpperAI();

const client = new OpenAI({
    baseURL: "https://api.opper.ai/compat/openai",
    apiKey: "OPPER_API_KEY",
    defaultHeaders: { "x-opper-api-key": "OPPER_API_KEY" },
});

async function main() {
    const trace = await opper.traces.start({
        name: "node-sdk/using-the-openai-sdk",
        input: "What is the capital of France? Please reverse the name before answering.",
    });

    const completion = await client.chat.completions.create({
        model: "openai/gpt-4o-mini",
        messages: [
            {
                role: "user",
                content: "What is the capital of France? Please reverse the name before answering.",
            },
        ],

        // @ts-expect-error These are Opper specific params.
        // fallback_models: ["openai/gpt-4o-mini"],
        span_uuid: trace.uuid.toString(),
        // evaluate: false,
    });

    await trace.end({ output: { foo: completion.choices[0].message.content } });
}

main();

Gemini 2.0: Flash

We have added support for Gemini 2.0 Flash, hosted by Google Cloud Platform (US). You can access it in Opper using the model name:

• gcp/gemini-2.0-flash

Billing enabled

You can now add your credit card in the Opper platform to enjoy unlimited usage. The free tier continues to exist, but has a limited usage allowance per month for experimentation and testing.

Gemini 2.0 Flash Thinking

The new experiment from Google called Gemini 2.0 Flash Thinking is now available to test in Opper.

• gcp/gemini-2.0-flash-thinking-exp

Deepseek R1

We have added support for Deepseek R1. You can access it in Opper using this model name:

• fireworks/deepseek-r1

Deepseek v3

We have added support for Deepseek v3, hosted by Fireworks AI (US). You can access it in Opper using this model name:

• fireworks/deepseek-v3

New models

We have added support for the following new models.

• gcp/gemini-2.0-flash-exp
• groq/llama-3.3-70b-versatile

OpperCLI now supports showing usage information

The OpperCLI now supports showing usage information for your account. This can be used to get an overview of your usage, and optionally grouped by your custom call tags.

The basic usage showing total_tokens looks like this:

➜  opper usage list --fields=total_tokens
Usage Events:

Time Bucket: 2024-12-03T00:00:00Z
Cost: 0.029731
Count: 25
total_tokens: 4806

Time Bucket: 2024-12-04T00:00:00Z
Cost: 0.025908
Count: 13
total_tokens: 4155

Time Bucket: 2024-12-06T00:00:00Z
Cost: 0.017290
Count: 7
total_tokens: 2689

More usage information can be found by running the command:

➜  opper usage                           
Manage usage information

Usage:
  opper usage [command]

Examples:
  # List usage information
  opper usage list

  # List usage with time range and granularity
  opper usage list --from-date=2024-01-01T00:00:00Z --to-date=2024-12-31T23:59:59Z --granularity=day

  # List usage with specific fields and grouping
  opper usage list --fields=completion_tokens,total_tokens --group-by=model,project.name

  # Show count over time as ASCII graph (default)
  opper usage list --graph

  # Show cost over time as ASCII graph
  opper usage list --graph=cost

  # Show count over time by model
  opper usage list --group-by model --graph

  # Export usage as CSV
  opper usage list --out csv

Tracking calls using a customer tag looks like this. First include the customer tag in the call:

opper.call(
    name="my-function",
    input="Hello, world!",
    tags={"customer": "mycustomer"},
)

Then run the opper usage list --group-by=customer command to see the usage information grouped by the customer tag.

➜  opper usage list --fields=total_tokens --group-by=customer 
Usage Events:

Time Bucket: 2024-12-06T00:00:00Z
Cost: 0.025908
Count: 13
customer: <nil>
total_tokens: 4155

Time Bucket: 2024-12-06T00:00:00Z
Cost: 0.000007
Count: 1
customer: mycustomer
total_tokens: 23

New feature: Run evaluations on alternative models and prompts

Opper now supports running ad hoc evaluations with different models, instructions and function configurations. It works by running through a functions dataset entries and evaluating the results. This allows for testing how a function performs with current or alternative configuration.

See our documentation on Offline Evals for more information.

Updates to managing datasets

We have improved handling of datasets to help make it easier to populate them:

• Dataset entries now includes an expected field that is used in evaluations and in few shot configuration.
• Dataset entries can be populated from any trace, by uploading a json file or through the sdks.

See our documentation on Datasets for more information.

Added llms.txt to https://opper.ai

We added an llms.txt file to https://opper.ai to assist AI code editors like Cursor to find relevant documentation about Opper. See https://llmstxt.org/ for more information.

New models

We have added support for the following new models:

• gcp/gemini-exp-1114
• gcp/gemini-exp-1121
• mistral/pixtral-large-latest-eu
• xai/grok-beta
• xai/grok-vision-beta

Support for custom models

There is now support for custom models in Opper. This means that you can bring your own key to an existing model or add a completely custom model.

The easiest way to add a model is to use the Opper CLI. The README explains how to add a model, but here is an example of adding your own Azure deployment:

opper models create example/my-gpt4 azure/gpt4-production my-api-key-here '{"api_base": "https://my-gpt4-deployment.openai.azure.com/", "api_version": "2024-06-01"}'

This adds your custom deployment on my-gpt4-deployment.openai.azure.com and the model name gpt4-production using the my-api-key-here API key. This model is then accessible in Opper using the name example/my-gpt4.

Support for fallback models

The Opper API now support providing a list of fallback models, in addition to the main model used in a call. They will be tried in order until a model returns successfully.

Python sync example

from opperai import Opper
opper = Opper()
response, _ = opper.call(
    name="GetFirstWeekday",
    input="Today is Tuesday, yesterday was Monday",
    instructions="Extract the first weekday mentioned in the text",
    model="azure/gpt-4o-eu",
    fallback_models=["openai/gpt-4o"],
)
print(response)

Python async example

from opperai import AsyncOpper
import asyncio
opper = AsyncOpper()
async def main():
    response, _ = await opper.call(
        name="GetFirstWeekday",
        input="Today is Tuesday, yesterday was Monday",
        instructions="Extract the first weekday mentioned in the text",
        model="azure/gpt-4o-eu",
        fallback_models=["openai/gpt-4o"],
    )
    print(response)
if __name__ == "__main__":
    asyncio.run(main())

Node example

import OpperAI from 'opperai';
import fs from "fs";
import path from "path";
import os from "os";

async function testCallFallback() {
    // Replace 'your-api-key' with your actual OpperAI API key
    const client = new OpperAI({ apiKey: 'your-api-key' });

    const { message, span_id } = await client.call({
        name: "GetFirstWeekday",
        input: "Today is Tuesday, yesterday was Monday",
        instructions: "Extract the first weekday mentioned in the text",
        model: "azure/gpt-4o-eu",
        fallback_models: ["openai/gpt-4o"],
    });

    console.log(message);
}

testCallFallback();

Added support for Anthropic Claude 3.5 Haiku

import asyncio
from opperai import AsyncOpper

async def haiku():
    aopper = AsyncOpper()
    res, _ = await aopper.call(
        model="anthropic/claude-3.5-haiku",
        name="new-haiku-3-5",
        instructions="answer the following question",
        input="what are some uses of 42",
    )
    print(res)


asyncio.run(haiku())

Enhanced Sidebar for Project Navigation

With our new sidebar update, users can now effortlessly select their desired projects directly from the side panel. This improved navigation persists across indexes, traces, and functions, ensuring a seamless workflow experience.

Added Metrics Filtering

We've upgraded our metrics display within trace spans. Users can now apply filters to better manage the metrics they need to focus on. These enhancements provide a clearer, more accessible presentation of data within the trace table.

Streaming support for call()

It is now possible to stream the response from the call() method.

import asyncio
from opperai import AsyncOpper

async def stream():
    aopper = AsyncOpper()
    res = await aopper.call(
        model="anthropic/claude-3.5-sonnet",
        input="what are some uses of 42",
        stream=True,
    )
    async for chunk in res.deltas:
        print(chunk)

asyncio.run(stream())

For node sdk see examples

Added support for updated version of Anthropic Claude 3.5 Sonnet

import asyncio
from opperai import AsyncOpper

async def sonnet():
    aopper = AsyncOpper()
    res, _ = await aopper.call(
        model="anthropic/claude-3.5-sonnet-20241022",
        name="new-sonnet-3-5",
        instructions="answer the following question",
        input="what are some uses of 42",
    )
    print(res)


asyncio.run(sonnet())

The anthropic/claude-3.5-sonnet model now defaults to the updated version.

Updated default model

If you do not explicitly provide a model in your call(), it will now default to the azure/gpt-4o-eu model.

Added support for Imagen 3 in the Python and Node SDKs

Opper now support two image generation models, azure/dall-e-3-eu and gcp/imagen-3.0-generate-001-eu. Here is an example of generating an image from a description in Python:

def generate_image(description: str) -> ImageOutput:
    image, _ = opper.call(
        name="generate_image",
        output_type=ImageOutput,
        input=description,
        model="gcp/imagen-3.0-generate-001-eu",
        configuration=CallConfiguration(
            model_parameters={
                "aspectRatio": "9:16",
            }
        ),
    ) 
    return image


description = "portrait of a person standing in front of a park. vibrant, autumn colors"

path = save_file(generate_image(description).bytes)
print(path)

Here is a similar example in TypeScript:

async function testImageGeneration() {
    const image = await client.generateImage({
        model: "gcp/imagen-3.0-generate-001-eu",
        prompt: "portrait of a person standing in front of a park. vibrant, autumn colors",
        configuration: {
            model_parameters: {
                aspectRatio: "9:16",
            }
        }
    });

    const tempFilePath = path.join(os.tmpdir(), "image.png");
    fs.writeFileSync(tempFilePath, image.bytes);
    console.log(`image written to temporary file: ${tempFilePath}`);
}

testImageGeneration();

Model parameters vary between models, but here are the supported ones for each model:

azure/dall-e-3-eu:

• style: natural, vivid
• quality: standard, hd
• size: 1024x1024, 1792x1024, 1024x1792

gcp/imagen-3.0-generate-001-eu:

• aspectRatio: 1:1, 3:4, 4:3, 16:9, 9:16

Images as input to multimodal models

You are now able to pass images as input to multimodal models.

Python SDK

# special type for images, this is to capture the need for encoding the image in the right format
from opperai import ImageInput 

description, response = await aopper.call(
    name="async_describe_image",
    instructions="Create a short description of the image",
    output_type=Description,
    input=Image(
        image=ImageInput.from_path("examples/cat.png"),
    ),
    model="openai/gpt-4o",
)

Node SDK

// special function to read images, this is to capture the need for encoding the image in the right format
import { opperImage } from "opperai"; 

const { message } = await client.call({
    parent_span_uuid: trace.uuid,
    name: "node-sdk/call/multimodal/image-input",
    instructions: "Create a short description of the image",
    input: {image: image("examples/cat.png")},
    model: "openai/gpt-4o",
});

Image generation using DALL-E 3 now available

Using the ImageOutput type you are now able to generate images via call using DALL-E 3 in the Python SDK.

from opperai import ImageOutput

cat, _ = await aopper.call(
    name="generate_cat",
    output_type=ImageOutput,
    input="Create an image of a cat",
)

Using the Node SDK you can generate images using DALL-E 3.

const cat = await client.generateImage({
    parent_span_uuid: trace.uuid,
    prompt: "Create an image of a cat",
});

New models added

• aws/claude-3.5-sonnet-eu
• cerebras/llama3.1-8b
• cerebras/llama3.1-70b
• gcp/gemini-1.5-pro-002-eu
• gcp/gemini-1.5-flash-002-eu
• groq/llama-3.1-70b-versatile
• groq/llama-3.1-8b-instant
• groq/gemma2-9b-it
• mistral/pixtral-12b-2409-eu
• openai/o1-preview
• openai/o1-mini

See Cerebras for more information about these models.

Updated default embedding model

The new default embedding model for indexes is text-embedding-3-large.

New models added

• azure/meta-llama-3.1-405b
• azure/meta-llama-3.1-70b-eu
• azure/mistral-large-2407
• mistral/mistral-large-2407
• openai/gpt-4o-2024-05-13 (openai/gpt-4o currently points to this)
• openai/gpt-4o-2024-08-06

Add examples at call time

You can now add examples at call time. This is useful if you have a set of examples that you want to use as a reference for your model without having to manage a dataset.

output, _ = opper.call(
    name="changelog/python/call-with-examples",
    instructions="extract the weekday from a text",
    examples=[
        Example(input="Today is Monday", output="Monday"),
        Example(input="Friday is the best day of the week", output="Friday"),
        Example(
            input="Saturday is the second best day of the week", output="Saturday"
        ),
    ],
    input="Wonder what day it is on Sunday",
)

The three ways of tracing your code using the Python SDK

Manually

span = opper.traces.start_trace(name="my_function", input="Hello, world!")
# business logic here
span.end()

Using context manager

with opper.traces.start(name="my_function", input="Hello, world!") as span:
    # business logic here

Using the @trace decorator

@trace
def my_function(input: str) -> str:
    # business logic here

Call a LLM without explicitly creating a function using the Python SDK

You can now call a LLM without explicitly creating a function.

opper.call(name="anthropic/claude-3-haiku", input="Hello, world!")

Manually trace using the Node SDK

You can now manually trace using the Node SDK.

// Start parent trace
const trace = await client.traces.start({
    name: "node-sdk/tracing-manual",
    input: "Trace initialization",
});

// You can optionally start a child span and provide the input
const span = await trace.startSpan({
    name: "node-sdk/tracing-manual/span",
    input: "Some input given to the span",
});

// A metric and/or comment can be saved to the span
// A span generation can also be saved using .saveGeneration()
await span.saveMetric({
    dimension: "accuracy",
    score: 1,
    comment: "This is a comment",
});

// End the span and provide the output
await span.end({
    output: JSON.stringify({ foo: "bar" }),
});

// End the parent trace
await trace.end({ output: JSON.stringify({ foo: "bar" }) });

Call a LLM without explicitly creating a function using the Node SDK

You can now call a LLM without explicitly creating a function.

const { message } = await client.call({
    name: "node-sdk/call/basic",
    input: "what is the capital of sweden",
});

Manually adding generations

You can now manually add generations to your traces. This is useful if you call an LLM outside of Opper but still want to use the tracing capabilities of Opper.

def run():
    opper = Opper()
    spans = opper.spans

    with spans.start("transform", input="Hello, world!") as span:
        t0 = datetime.now(timezone.utc)
        manually_call_llm()
        t1 = datetime.now(timezone.utc)
        span.save_generation(
            called_at=t0,
            duration_ms=int((t1 - t0).total_seconds() * 1000),
            response="I'm happy because I'm happy",
            model="anthropic/claude-3-haiku",
            messages=[
                {
                    "role": "user",
                    "content": "Hello, world!",
                }
            ],
            cost=3.1,
            prompt_tokens=10,
            completion_tokens=10,
            total_tokens=20,
        )

OpenAI model GPT-4o mini now available

We have added support for the just released GPT-4o mini model from OpenAI.

Projects now available

Projects allow you to create separation in Opper. Currently, the following is tied to a project:

• Functions
• Indexes
• Traces
• API keys

When you create an API for a specific project, all usage will be associated with that specific project automatically, so there is no need to pass the project as you are using it.

Manage organizations and invite your colleagues

You are now able to create your own organizations in Opper. Go to Settings --> Organization and click Create Organization in the top right corner to get started.

Once you have created your organization, you are able to invite your colleagues by sending an invite to their email address. Once they are in, you are able to collaborate and have a common view of your AI usage.